问题
I've got a Rails app running on Heroku and installed the free pgbackups addon.
There's three records I'd like to restore from the backup.
According to Heroku docs when you do a restore, it restores the whole database.
How do I restore just these three records?
回答1:
Create a new database, load the pgbackup into it, and then cherry pick what you want out of it.
回答2:
As far as I know Heroku is using what's referred to as the "-Fc" format for everything, which is described in the pg_dump section of the manual as the custom format. That can't be read by anything but pg_restore, so you're limited to what it knows how to do. You can get pg_restore to only process a single table, which can speed things up if your database is big and you only care about a few records in one table. But there's no way to only get a few records restored out of there; you'll have to restore the entire table they're in and then dump them back out.
来源：https://stackoverflow.com/questions/8536300/how-do-i-restore-three-items-from-a-backup-made-using-heroku-pg-backups